Synthesis of a Manganese Germavinylidene Complex from Bis(germavinylidene)

The reaction of bis(germavinylidene) [(Me3SiNPPh2)2CGe→GeC(PPh2NSiMe3)2] (1) with CpMn(CO)2(THF) (Cp = η5-C5H5) in THF afforded [(Me3SiNPPh2)2CGe→Mn(CO)2Cp] (2). Similar reaction of 1 with (cod)RhCl (cod = 1,5-cyclooctadiene) in THF gave [(Me3SiNNPPh2)2{(cod)Rh}C−GeCl] (3). The results suggested that reactive germavinylidene may exist in solution. The X-ray structures of 2 and 3 have been determined.